.pdc-root { max-width:800px; margin:20px auto; font-family:Arial,sans-serif; }
.pdc-root input[type="text"], .pdc-root input[type="number"] { width:100%; padding:8px; margin:6px 0 12px 0; box-sizing:border-box; }
.pdc-root button { background:#2563eb; color:#fff; border:0; padding:10px 14px; border-radius:6px; cursor:pointer; }
.pdc-result { margin-top:12px; background:#f7f9fb; padding:10px; border-radius:6px; border:1px solid #e1e8f0; }
.pdc-error { color:#b00020; }
.pdc-root label { font-weight:600; display:block; margin-top:10px; }